<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>单选按钮</title>
	</head>
	<body>
		<form action="form.php" method="post">
		<input type="radio" name="sex" value="男" checked="checked"/> 男	
		<input type="radio" name="sex" value="女"/>	女
		</form>
	</body>
</html>